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Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity
In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation betwe...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649668/ https://www.ncbi.nlm.nih.gov/pubmed/37960547 http://dx.doi.org/10.3390/s23218847 |
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author | Miyauchi, Ken Isozaki, Toshiyuki Ikeno, Rimon Nakamura, Junichi |
author_facet | Miyauchi, Ken Isozaki, Toshiyuki Ikeno, Rimon Nakamura, Junichi |
author_sort | Miyauchi, Ken |
collection | PubMed |
description | In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation between light intensity and PDFWC is logarithmic because PDFWC is determined by the balance between the photo-generated current and overflow current under the bright condition. Furthermore, with using pulsed light before a charge holding operation in PD, the accumulated charges in PD decrease with the holding time due to the overflow current, and finally, it reaches equilibrium PDFWC. The analytical model has been successfully validated by the technology computer-aided design (TCAD) device simulation and actual device measurement. |
format | Online Article Text |
id | pubmed-10649668 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-106496682023-10-31 Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity Miyauchi, Ken Isozaki, Toshiyuki Ikeno, Rimon Nakamura, Junichi Sensors (Basel) Article In this paper, the light intensity and charge holding time dependence of pinned photodiode (PD) full well capacity (FWC) are studied for our pixel structure with a buried overflow path under the transfer gate. The formulae for PDFWC derived from a simple analytical model show that the relation between light intensity and PDFWC is logarithmic because PDFWC is determined by the balance between the photo-generated current and overflow current under the bright condition. Furthermore, with using pulsed light before a charge holding operation in PD, the accumulated charges in PD decrease with the holding time due to the overflow current, and finally, it reaches equilibrium PDFWC. The analytical model has been successfully validated by the technology computer-aided design (TCAD) device simulation and actual device measurement. MDPI 2023-10-31 /pmc/articles/PMC10649668/ /pubmed/37960547 http://dx.doi.org/10.3390/s23218847 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Miyauchi, Ken Isozaki, Toshiyuki Ikeno, Rimon Nakamura, Junichi Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title | Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title_full | Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title_fullStr | Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title_full_unstemmed | Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title_short | Analysis of Light Intensity and Charge Holding Time Dependence of Pinned Photodiode Full Well Capacity |
title_sort | analysis of light intensity and charge holding time dependence of pinned photodiode full well capacity |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10649668/ https://www.ncbi.nlm.nih.gov/pubmed/37960547 http://dx.doi.org/10.3390/s23218847 |
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